Andrii
Lysenko

Tech Lead on recent projects: architecture decisions, mentoring developers and delivery in Agile teams. My focus is microservices architecture, distributed systems and backend engineering, with hands-on system design, performance optimisation and continuous delivery.

1. 2021–nowAlgorithmic Trading Framework · Senior Software Engineer, Product Owner50+ strategies · 1,500 req/s market data · 2,000+ back-testsFounder+

   A self-developed framework for automated cryptocurrency trading that executes, monitors and optimises strategies in real time. It handles order management, risk control and portfolio tracking through exchange APIs, with back-testing and performance analysis.

   • Designed a modular, strategy-driven architecture: 20+ indicators, 50+ strategies
   • Integrated exchange APIs for order execution, account management and market data streaming at 1,500 requests/s
   • Built averaging and signal-based strategies, plus a back-testing engine with performance reporting
   • Designed risk management: position sizing, leverage handling, liquidation control
   • Optimised concurrent trading across many pairs, with monitoring and logging for the full trade lifecycle
   • Analysed 2,000+ test runs to find stable trading pairs and strategy improvements
   • Development now runs on sprintkit, my plugin for autonomous Claude Code sprints; the reports dashboard is built in Next.js

   Java 8–21JHipsterSpring BootTomcatPostgreSQLH2RESTWebSocketsAWSBinance APIGoogle APIAnthropic APIClaude CodeAgentic EngineeringNext.js
2. 2020–2026Healthcare Platform · Senior Software Engineer, Tech LeadPrinting ×10 · spellcheck ×100 · Java 8 → 17 across 20+ reposEU customer · 12–15 people+

   A large-scale, GDPR-compliant platform where medical staff manage patient records, staff, organisational units, printing and administrative workflows. It covers access control, document generation and printing, spellchecking, data exchange and reporting.

   • Made printing 10× faster and spellchecking 100× faster
   • Migrated the legacy stack across 20+ repositories: Java 8 → 17, Spring 5 → 6, Hibernate 5 → 6
   • Owned architecture and design, code review, estimation, prioritisation and task distribution
   • Agreed feasibility and timelines with the Product Owner and BA; wrote technical specs in Confluence
   • Maintained Jenkins pipelines, product support and documentation

   Java 8–17SpringSpring BootActiveMQ ArtemiseCacheTomcatJBossOracleMySQLPostgreSQLRESTRPCAsciiDocJiraConfluence
3. 2018–2020Government Platform · Software Engineer, Team LeadTeam lead · digital public services · OWASP Top 10Canadian customer · 5–6 people+

   A platform for digital public services with high user volume and sensitive data. Backend services hold the core business logic and integrate with external state systems. Operators work in an admin panel; citizens get their data and documents in a user portal.

   • Led a team of 5–6 engineers and ran the Scrum process
   • Reported development quality metrics to the customer from SonarQube
   • Security testing against the OWASP Top 10

   Java 5–8JSPZK FrameworkjOOQMS SQLOracleApache SolrAngularJSWebDAVMavenAntSVN
4. 2017Medical B2B Payments · Software EngineerPython → Java microservices rewriteUS company · 5 people+

   Payment transaction processing, credit operations and financial reporting for a medical B2B product. The goal was higher performance and scalability by moving from Python to Java microservices.

   • Rewrote all functionality from Python to Java microservices
   • Refactored legacy code and improved existing features
   • Covered the service with unit and integration tests

   Java 8PythonDropwizardHibernateKafkaCamundaPostgreSQLDerbyAnsibleJUnit
5. 2016–2017Building Store eCommerce · Junior Software EngineerCustom checkout · 85%+ test coverageEuropean company · 7 people+

   A B2C store on SAP Hybris B2C Accelerator with payment gateway integrations, customer reviews and a custom checkout built on Spring Web Flow.

   • Built new checkout functionality
   • Improved B2B and B2C promotions
   • Raised unit and integration test coverage to 85%+ with TDD, BDD and pair programming

   Java 8Hybris 5.5Spring MVCSpring Web FlowMySQLCucumberJUnit
6. 2015Documents Search Engine · Junior Software EngineerFull-text search on Apache SolrEuropean company · 5 people+

   Search across internal documentation and reports for management and operations staff, built on SAP Hybris with Apache Solr and configurable filters.

   • Implemented full-text search features and advanced filters
   • Wrote unit and integration tests

   Java 8Hybris 5Apache SolrSpring MVCMySQLJSP